News sources:

Japanese media (mostly) in English

Television:

NHK World (日本放送協会 Nippon Hōsō Kyōkai). NHK World is the international broadcasting service of NHK (Nippon Hōsō Kyōkai - Japan Broadcasting Corporation), Japan's public broadcaster. NHK identifies itself to its audiences by the English pronunciation of its initials.

Newspapers:

The Daily Yomiuri (読売新聞). Conservative. 1st ranked in daily circulation—around 10 million per day. The Yomiuri Shimbun, being very widely circulated, takes the most popular stance. The Yomiuri exchanged a special contract with British The Times. Affiliated with Nippon Television.

Asahi Shimbun (朝日新聞). Left of center or liberal. 2nd ranked in daily circulation—around 8 million per day. Known for its preeminent writers as well as the frequency with which its articles are used for university admission examinations. Affiliated with TV Asahi and the International Herald Tribune.

Nikkei Shimbun (日本経済新聞). Economic paper similar to the Wall Street Journal. 4th ranked in daily circulation - around 3 million per day. Affiliated with TV Tokyo.

The Japan Times. An English language newspaper published in Japan. Unlike its competitors, the Daily Yomiuri and the International Herald Tribune/Asahi Shimbun, it is not affiliated with a Japanese language media organization.

Magazines:

Non-Japanese:

Other useful information:

RDTN.org - A local Portland, OR guy, Marcelino Alvarez, created this app in 72 hours to display the reliable (radiation levels) data readings as they become available. Although they are careful to evaluate new data sources, they welcome new reliable data from those on the ground in this crisis. With conflicting reports of radiation levels in affected areas, they wanted to build a way to report and see data in an unbiased format.

Thanks for noticing it, Rich. I started hearing about the mapping and Google applications that were springing up around this, and then I put down the international sources that I was watching, and then I fell in. I'm glad it's helpful.